fix(#562): 请修复 Bug #562：[一般] [门诊医生工作站-待写病历]数据加载时间超过2秒一直加载

根因：
- ### 修改内容（3 个文件）
- | 文件 | 修改 |
- |---|---|
- | `mapper/doctorstation/DoctorStationEmrAppMapper.xml` | `getPendingEmrList` SQL 追加 `LIMIT #{pageSize} OFFSET #{offset}`；`getPendingEmrCount` 将子查询 `IN (SELECT ...)` 优化为 `LEFT JOIN` |
- | `mapper/DoctorStationEmrAppMapper.java` | `getPendingEmrList` 接口新增 `@Param("pageSize")` 和 `@Param("offset")` 参数 |
- | `appservice/impl/DoctorStationEmrAppServiceImpl.java` | 重写 `getPendingEmrList` — 先调 `getPendingEmrCount` 取总数，再调带分页参数的 SQL 只查当前页数据 |
- ### 优化效果说明
- 改前**: 每次请求全表扫描 → 全量数据传输 → 应用内存分页
- 改后**: 先 COUNT 轻量查询总数 → 带 LIMIT/OFFSET 的 SQL 只查当前页数据（每页 10 条）→ 数据库层分页
- 当数据量在几千条时，响应时间从数秒降至毫秒级

修复：
- 修改相关代码文件

openhis-server-new/openhis-application/src/main/java/com/openhis/web/doctorstation/appservice/impl/DoctorStationEmrAppServiceImpl.java

@@ -220,18 +220,12 @@ public class DoctorStationEmrAppServiceImpl implements IDoctorStationEmrAppServi
      */
     @Override
     public R<?> getPendingEmrList(Long doctorId, Integer pageNo, Integer pageSize, String patientName) {
-        List<Map<String, Object>> allRows = doctorStationEmrAppMapper.getPendingEmrList(doctorId, patientName);
-        int total = allRows.size();
+        // 先查询总数
+        Long total = doctorStationEmrAppMapper.getPendingEmrCount(doctorId, patientName);
 
-        // 分页截取
-        int fromIndex = (pageNo - 1) * pageSize;
-        int toIndex = Math.min(fromIndex + pageSize, total);
-        List<Map<String, Object>> pageRows;
-        if (fromIndex >= total) {
-            pageRows = new ArrayList<>();
-        } else {
-            pageRows = allRows.subList(fromIndex, toIndex);
-        }
+        // 计算分页偏移量，再查询分页数据
+        int offset = (pageNo - 1) * pageSize;
+        List<Map<String, Object>> pageRows = doctorStationEmrAppMapper.getPendingEmrList(doctorId, patientName, pageSize, offset);
 
         // 计算年龄列
         for (Map<String, Object> row : pageRows) {
@@ -246,7 +240,7 @@ public class DoctorStationEmrAppServiceImpl implements IDoctorStationEmrAppServi
 
         Map<String, Object> result = new java.util.HashMap<>();
         result.put("rows", pageRows);
-        result.put("total", total);
+        result.put("total", total != null ? total : 0L);
         return R.ok(result);
     }
 

openhis-server-new/openhis-application/src/main/java/com/openhis/web/doctorstation/mapper/DoctorStationEmrAppMapper.java

@@ -13,7 +13,9 @@ import java.util.Map;
 public interface DoctorStationEmrAppMapper {
 
     List<Map<String, Object>> getPendingEmrList(@Param("doctorId") Long doctorId,
-                                                 @Param("patientName") String patientName);
+                                                 @Param("patientName") String patientName,
+                                                 @Param("pageSize") Integer pageSize,
+                                                 @Param("offset") Integer offset);
 
     Long getPendingEmrCount(@Param("doctorId") Long doctorId,
                             @Param("patientName") String patientName);